6) (6x−12y)⋅(6x+12y)−36x² = 36x²-144y²-36x²= -144y² = -144*0,01= - 1,44
7) (0,8x+1,6y)²=0,64x²+2,56xy+2,56y²
7. (0.8х+1.6у)²=0.64х²+2.56ху+2.56у²
6) (6x−12y)⋅(6x+12y)−36x² = 36x²-144y²-36x²= -144y² = -144*0,01= - 1,44
7) (0,8x+1,6y)²=0,64x²+2,56xy+2,56y²